Mixing valve



May 10, 1938. R. H. ZINKIL ET AL MIXING VALVE Original Filed June 11,1934 S Q Q Patented May 10, 1938 UNETED STATES PATENT OFFICE rickson,Chicago, Ill.

, assignors to Crane 00.,

Chicago, 111., a corporation of Illinois Original application June 11,1934, Serial No.

730,004, now Patent No. 2,094,288, dated September 28, 1937. tionNovember 13,

1 Claim.

This invention relates to valves and more particularly to a valveconstructed in a new manner and is a division of our co-pendingapplication,

" Serial No. 730,004, filed June 11, 1934, and now u Patent No.2,094,288, granted September 28,

1937, for a mixing valve.

Our invention relates to that type of pedal operated mixing valve inwhich hot and cold water are brought together from each of theirrespective supply pipes into a common chamber within the valve proper. i

More particularly, the primary purpose of our invention is to providefor an accurate, convenient and more easily controlled mechanical meansfor varying the temperature of the mixed water.

Another important object is to provide for a construction in which theadjustment of the respective hot and cold water valves is also readilyaccessible after installation, comprising a removable or separable floorhousing preferably independent of the valve chamber proper.

Another important object is to obtain the quick opening with arelatively small movement of the actuating means of both. valves with asmooth and uniform action; functioning by means of a pivotable pedal.

Another object is to provide certain improvements in mixing valves ofthis character affording ease of installation upon the floor adjacent tothe fixture.

We attain these objects by mechanism similar 1 to that illustrated inthe accompanying drawing, in which .3 Fig. 1 is a front, vertical,sectional view of the internal relation of the valves and theircontrolling parts within the respective valve chamber and housing and inwhich the mode of operation is obtained by means of a pivotable pedalaction a for foot operation.

Fig. 2 is a view partly in side elevation and partly in side verticalsection of the embodiment shown in Fig. 1.

Similar numerals 5 throughout the views.

Referring to Fig. 1, the body or housing I of the valve comprises aplurality of parallel positioned valve chambers 2 at its upper portion,containing the valve members 3 consisting prefl erably of a discretaining ring 3a for the purpose of retaining a composition disc 4 bymeans of the threads 5. These valves more specifically are guided forreciprocatory movement and are of a poppet type, seating downwardlyagainst the valve seats 6 under the action of the springs refer tosimilar parts Divided and this applica- 1936, Serial No. 110,582

1. The valve chambers 2 have lateral inlets 8 and 9 adapted to beconnected with the respective cold and hot water supply pipes (indicatedbut not shown).

The upper ends of the valve chambers are closed by means of the plugsl0, which retain the springs l, the plugs being preferably removable inorder to gain access to the valve members and springs withoutnecessitating disconnection of the valve chamber from the floor it self.The valve members 6 preferably seat against renewable seat rings H,which are preferably threadedly attached to the casing I.

Each of the respective poppet valves is guided by the extension rods l2and lZa which move in reciprocating manner as journalled within therespective bores I3 of the caps Ill, the purpose of the rods being toguide and to thereby prevent a wobbling movement of the valve as eachreturns to its seat 6 under the action of the spring. The guide memberl2, as previously mentioned, is threaded to provide for the retainingmeans 3 for the renewable disc 4. In referring to the valve shown in theright hand portion of Fig. 1, the guide member 12 is provided with afrustro-conical extension I lie against which the push rod I4 rests whenthe valve is installed in its normal position. The member l2o ispreferably threadedly attached to the guide means by screwdriver slotI21). This construction applies to the valve controlling the supply ofhot water.

Referring to the left hand or cold water side of theFig. 1 as designatedby numeral 8, the

guide lZa therein is made to permit the tappet rod Mb to bear againstthe latter as at Ho. The reason for the difference in the constructionshown is to prevent the wrongful positioning of the respective valves.The tappet rod Mb, as in dicated, is provided preferably integrallywith. an enlargement thereon for the purpose of diminishing the supplyof cold water as the valve approaches its maximum movement in opening.while the hot water under the same movement and by reason of the sameform of enlargement attached to the guide member l2 increases in itsvolume in the amount of water entering through the seat opening as it isgradually being opened. Briefly, so far as respective volume control isconcerned, their action is recip-rocal although this relationship asmentioned may be materially changed by the positioning of the threadedadjusting screws hereinafter described.

The elongated push rods or valve actuating means 14 are each journalledwithin a springloaded stuffing box l5 extending through and beyond thebushing l6 into the interior of the lower housing, and are made of suchlength so as to permit the necessary clearance between the adjustingscrew I1 and the end of the respective rod 1411. A crosshead member l8supports the adjusting screws I! in locked or non-rotatable engagementby means of the locknuts I9 and is attached to the central operatingmeans by a nut and washer, respectively designated as 2| and 22, andalso held in non-rotatable position, as indicated. The upper end of thebroached head 23 has the thread member 25 preferably made for guidancewithin the hollow guide 26.

It is apparent that the respective valve rods l4 being operated bydepressing the foot pedal designated as 34, which is hingedly attachedto the housing 32 as shown at 35, thereby engages the slidable assembly36 by means of the slotted connection 31 which assembly consists of theslot and the complementary lever extension 38. The spring 39 tends tokeep the extension 36 bearing against the shoulder 4| and by depressingthe pedal 34 the respective extension stems are lifted axially untilsuch time as the valves 3 are raised from the seats, thus admitting thedesired amount of hot and cold water respectively. It is obvious thatthe amount of depression of the respective valves is easily controllableby means of the fine adjustment permissible on the adjusting screws I!mounted upon the crosshead l8.

Thus the temperature or the water and also the amount thereof enteringthe upper chamber and discharging through the outlet 3d is convenientlycontrolled and handled.

It is apparent that our invention is capable of numerous modificationsfalling within its spirit and we desire, therefore, to be limited onlyto the extent ofthe appended claim.

We claim:

In a mixing valve comp-rising a casing having hot and cold fluid inletsthereto and a fluid outlet or outlets therefrom, a housing adjacent tothe said casing and having a forward, vertically extending wall,simultaneously operable valves for the control of fluids through saidinlets, a crosshead reciprocably movable and journally guided within theinterior lower portion of the said housing, the said crosshead beingactuated by a single pivotable pedal operable exteriorly of said housingthe said pedal being limited to downward movement and mounted upon saidvertically extending wall, the said crosshead having independentlyadjustable means cooperating with the said pedal for accomplishing thetime of movement and regulating the travel of the said valves, thelatter having extending portions projecting within said housing, thesaid extending portions serving as means for contacting with the saidadjustable means of the crosshead.

ROY H. ZINKIII. EDWARD A. FREDRICKSON.

